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Systems · File digitrecognizer

DigitRecognizer

CompleteBuilt by me· probable2024

A neural network handwritten from scratch in NumPy — forward propagation, backprop, and gradient descent on MNIST, no frameworks.

Flight data file · digitrecognizer · 2024

01Architecture

Single-hidden-layer network with sigmoid activations, trained entirely from scratch; interactive testing on MNIST or custom handwritten digits.

02Lessons learned

  • Implementing backprop by hand is the fastest way to actually understand what frameworks abstract away.